Improvement in dampers



J. F. STAFFORD;

Chimney Damper. No.v 71,077. "Patented Nov. 19, I867.

' N.FETERS PHOTO-UTHQGRAPMER, WASHINGTON D C ign e 'tatts ism @ffiu.

JOSEPH F. STAFFORD, OF NORTH, GRANVIL E; NEW YORK.

Letters Patent 1%. 71,077, dated November 19, 1867. i

IMPROVEMENT IN DAMPERS.

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TO A L WHOM IT MAY conennua Be it known that I, JOsEPII F. STAnFoitn, ofNorth Granville, i n the ,county of Washington, and State of New York,have invented anew and useful Improvement in Chimneys; and I do herebydeclare that the follow 'ing is a full, clear, and exact descriptionthereof,whieh will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawing, forming a partofthis specification.

The nature of my invention consists in the employment of adamper locatedin the chimney, ncar the top,

and operated by means of a lever attached thereto, having for its objectthe prevention of fire, which often occurs in the chimney, andcommunicates to the building, which is consumed.

By my invention I am'able to prevent any catastrophe of this kind, asany child can operate it and prevent all danger from fire thatoriginates in this manner. I I v a I will now proceed to describe theconstruction and operation of my invention.

Thefigure represents a longitudinal vertical sectional elevation of achimney, showing the damper and the attachments by which it is cperated.v

Letters of like name' and kind indicate like parts in the figure.

Areprescnts a section of a chimney of common construction, withmyjimprovcments attached. 3 is a damper, made of sheet metal or othersuitable material, provided with lugs a a, through which are holes madeto receive the shaft 0, the said shaft having hearings in the walls ofthe chimney, so that the damper is allowed to turn on the shaft C. Thelugs a are secured some distance from the centre of thedamper, so thatby its own weight-.itwill turn down, and the flue of thechimncybeunobstructed. D is a bent or curved lever, secured totheldanipcr 13, upon the end of which is a weight, E, for the pnrposc ofloading that end of the damper so that it will more readily turn downupon the pivot-shaft O, and open the fine of the chimney. At the outeror curved end of the lever D is connected, ate, by a joint, the rod thatextends down and connectsto a small chain, G. The said chain G connectsto and works around the shaft H, the shaft H havingbearings in the wallof the chimney A. Upon the outer end of the shaft I-l is'firmly secureda ratchet-wheel, I, in which-worksa pawl, J, shown in dotted lines.

In case the soot in the chimney takes 'fire, by turning theratchet-wheel I in the direction of'the arrow the chain G windsaroundthe shaft H, which draws down the end of the lever D, and raises thedamper B, which turns on the pivot-bolt or shaftC, and closes the flueof the chimney, as shown in red lines, so that the, fire cannot burn.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- The damper B, suspended upon a pivot, a,andweightc'd at E so as to assume avcrtical position by gravity, andemployed in connection with the elevating and sustaining apparatus D F GH I J, as and for the purpose set forth. i JOSEPH F. STAFFORD.

Witnesses:

JACOB SAVAGE, .CnAnLns I. BAKEIL

